The Boost 4 Down-filled Foot Muff goes into the foot end of your sleeping bag to add down warmth around your feet. At 40 cm long and 51 cm wide, it is filled with Crystal Down® European grey duck down (90/10, 600+ cuin) and has an official weight of 90 g. A draw cord with a sewn-in stopper adjusts the fit.
Boost 8 down liner
The Boost 8 Down-filled Liner combines a down-filled footbox with a blanket-like upper. Slip it inside the sleeping bag and tighten the footbox with the draw cord. Like the Boost 4, it is filled with Crystal Down® European grey duck down and has a 20D rip-stop nylon shell and lining, with an official weight of 206 g. If you are choosing a new bag for cold trips, compare the limit temperatures in our winter sleeping bags.
Cotton liner
Lying between you and the bag, the Cotton Liner Blanket helps stop sweat, dirt and body oil from reaching the sleeping bag, so the bag needs washing less often. It measures 210 cm in length and 80 cm at both shoulders and feet, and it can go in the washing machine at 30 °C. On warm nights in a cabin or camper van, use it on its own as a light blanket. Down bags can be washed by Care & Repair in Görlitz.
Storing between trips
Down should not stay compressed for long periods, so use the pack sack (compression bag) for travel and keep the bag loose in a storage bag at home. The universal bags below replace originals that are lost or worn out, and their fit lists cover both down and synthetic models in our sleeping bags range.
Size depends on the model. The Walløe +10° Mummy and Walløe ±0° Mummy take the storage bag in M and the pack sack in S, for example, while the Walløe -10° Mummy needs the storage bag in L and the pack sack in M.